Apparatus for testing heat protection property of thermal protection clothes or fabric

A testing device and thermal protection technology, applied in the field of thermal protection performance testing devices, can solve the problems of not being able to truly simulate the actual use situation, only considering the plane one-dimensionality of heat transfer, and unable to measure the thermal insulation and radiation protection performance, etc. Stable and reliable performance, light weight, and the effect of reducing measurement errors

Inactive Publication Date: 2005-09-28
DONGHUA UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At home and abroad, there are a lot of researches on the test instruments for the thermal insulation radiation performance of fabrics, but the thermal sensors can not really play the role of human skin simulator; in addition, these instruments can only be used to measure the thermal properties of flat fabrics, that is, only consider the heat transfer. Planar one-dimensionality, but the radial heat transfer device for measuring the thermal insulation of protective clothing has not been reported
[0003] At present, the commonly used measurement of fabric thermal protection performance is the (Radiant Protective Performance) RPP instrument made according to the NFPA 1977 standard. It uses five infrared quartz tubes with a power of 500 watts arranged in parallel as a radiation heat source, and conducts heat radiation on the sample vertically. , the copper mass calorimeter placed behind the sample is used to measure the heat flow through the sample. The heat shield between the sample and the radiation source is open, and the side of the fabric cannot be insulated, which will increase the test volume. error, and the device only considers one-dimensional heat transfer, using a copper heat flow meter that is quite different from the properties of human skin as a skin simulator cannot truly simulate the actual use, so it is also impossible to measure the insulation of the clothing worn by the human body. Thermal Radiation Protection

Method used

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  • Apparatus for testing heat protection property of thermal protection clothes or fabric
  • Apparatus for testing heat protection property of thermal protection clothes or fabric
  • Apparatus for testing heat protection property of thermal protection clothes or fabric

Examples

Experimental program
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Effect test

Embodiment 1

[0018] refer to Figure 1-3 , a heat protection performance testing device for heat protection clothing or fabrics, comprising a test head 1, a constant temperature water tank 15, an analysis control system 16 based on NI virtual instrument technology, the test head 1 is fixed on the frame 2, and fixed On its corresponding groove, the outermost layer of the test head is the thermal insulation layer 3, and the inner adjacent layer of the thermal insulation layer 3 is a cylindrical heat source 4, and the heat source 4 is a mica linear heating jacket with a height of 12cm , The mica heating mantle is an electric heater that winds the resistance heating wire on the mica sheet. It uses the good insulation performance and high temperature resistance of the mica sheet. cylindrical heating element. The size of sample 7 and skin simulator 8 is 12cm, the distance between the heating surface of sample 7 and the inner surface of heat source 4 is 2.5cm, sample 7 is closely attached to ski...

Embodiment 2

[0020] The heating source is a mica linear heating jacket with a height of 12 cm. The height of the sample and the skin simulator is the same as in Example 1. The sample is in close contact with the heat source and the surface of the skin simulator, that is, the air gap between them is zero, and the surface temperature of the heat source is 125°C, it can simulate and test the heat insulation performance of protective clothing when it is in contact with a heat source.

Embodiment 3

[0022] The heating source is a mica linear heating jacket with a height of 12 cm. The height of the sample and the skin simulator is the same as in Example 1. The distance between the heated surface of the sample and the inner surface of the heat source is 2.5 cm. The thickness of the air layer between the skin simulator and the fabric is 6mm, it can simulate the local high temperature heating environment, such as before heating the boiler, to measure the heat insulation performance of protective clothing (gloves, helmets).

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Abstract

The heat defending performance test equipment for heat defending suit or fabric consists of constant temperature test head and water tank measuring and control system, test head on the frame and surrounded with outer heat insulating layer, heat source layer and movable preheating shield layer sleeve, sample and skin simulator with air layer in between, thermocouples outside the skin simulator and connected to the measuring and control system, and constant column inside the skin simulator and with circular water channel connected to constant temperature water bath. The present invention has high test precision, stable and reliable operation and other advantages, and may be used in industrial production.

Description

technical field [0001] The invention relates to a device for testing the protective performance of special clothing or fabrics, in particular to a device for testing the thermal protective performance of thermal protective clothing or fabrics. Background technique [0002] In order to evaluate the heat insulation and radiation protection performance of thermal protective clothing (fabric), some testing standards have been formulated internationally, such as the widely adopted international standard ISO-6942, the American standard ASTM-D4108 and the NFPA 1971 and NFPA 1971 formulated by the National Fire Protection Association for fire protection clothing. NFPA 1977 standard. Numerous test methods and instruments have been developed according to these standards. At home and abroad, there are a lot of researches on the test instruments for the thermal insulation radiation performance of fabrics, but the thermal sensors can not really play the role of human skin simulator; in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/20G01N33/36
Inventor 张渭源朱方龙
Owner DONGHUA UNIV
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